Boiler.



W. s. HAWLBY.

BOILEBf.

APPLIoATIoN FILED JAN. v, 190B.

Patented Sept. 22, 1908.

2 SHEBTS-SHEBT1- S E S S M U W ATTORNEYS me fwnms FTER'; co., wAsHm-cmu,n. c.

W. s. HAWLBY.

BOILER.

APPLIOATION FILED JAN. 7, 190e.

Patented Sept 2 2, 1908 2 SHEETS-SHEET 2.

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WILLIAM SERVISS HAWLEY, OF LANDING, NEW JERSEY.

BOILER.

Application filed January 7 1908.

Specification of Letters Patent.

Patented Sept. 22, 1908.

Serial N0. 409,639.

. ris and State of New Jersey, have invented a new and Improved Boiler,of which the following is a full, clear, and exact description.

This invention relates to certain improvements in boilers, and moreparticularly to that type of boiler designed for use in heating water orgenerating steam for the heating system of houses.

Structurally, the invention relates to that type in which the water iscontained in a plurality of superimposed communicating sections orchambers inclosed in a casing wall, the products of combustion beingcaused to pass back and forth between the sections to heat the same, andthe objects of the invention are to provide certain improvements wherebythe space between the sections may be more readily cleaned, the water inthe lowermost section more effectively heated, and the series ofsections more effectively supported.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both the figures, and in which Figure 1 is avertical section through a boiler constructed in accordance with myinvention, Fig.v 2 is a transverse section on the line 2 2 of Fig. 1.Fig. 3 is a side elevation, a portion being shown in section on the line3-3 of Fig. 1;"and Fig. 4- is a transverse section on the line 4 4 ofFig. 3.

In my improved boiler, I employ a plurality of superimposed sections orchambers, the lowermost section 10 being designed to substantiallyinclose the grate, the uppermost section 11 being designed to constitutea steam dome, and the intermediate sections 12 1 2!l and 12b beingconnected in series and in open communication with both the upper andthe lower sections. The lowermost section is provided with asubstantially horizontal top wall 13, a hemispherical or domeshapedlower wall 14, and a circumferential substantially vertical outer wall15. The lower edge of the latter section rests upon the base 16 of thestructure, and the gratebars 17 are preferably in substantially a planewith the lower surface of the section. The section is provided with twopassages 18 and 19 therethrough, one of said passages,

18, extending diagonally from the inner dome-shaped wall to the upperwall or top 13, and serving to permit the escape of the products ofcombustion, while the other passage, 19, extends substantiallyhorizontally from the dome-shaped wall 14 to the circumferential wall 15and serves for the admission of fuel. y

For reinforcing and strengthening the dome-shaped wall and at the sametime for directing the gases toward the escape passage 18 and forfacilitating the heating of the water, the dome is preferably formedwith two depending hollow Hanges 10a, coinmunicating at their upper endswith'the water chamber of the section, and curved at their lower ends.The flanges extend transversely of the boiler upon opposite sides of thecenter and lead from adjacent the fuel inlet door 19 toward the gasescape passage 1.8. The curved lower edge of the flange serves as atruss, while the space between'the flanges forms a transverse channelfor the gases, and

water within the flanges is exposed to heating action from oppositeSides. Thus, in the lower section the water extends entirely over thefire chamber and down upon all sides thereof and also down into the firechamber in the flanges. In the lower section, the water thus extendsentirely over the fire chamber and down upon all sides thereof to thelevel of the grate, so that the largest possible amount of heat isabsorbed from the fire by the water.

The sections 12, 12a and 12D are all substantially identical, and eachis rovided with a lower substantially horizonta wall 20, an uppersubstantially horizontal wall 21, and a circumferential wall 22, all ofsubstantially the same diameter as the circumferential wall 15 of thelower section. Each of the sections 12, 12a and 12b is provided with acentrally-disposed threaded boss in both its upper and its lower wall,and the upper wall 13 of the lowermost section and the lower wall 23 ofthe uppermost or top section 11, are provided with threaded bosses intheir upper and lower surfaces, respectively, and in alinement withthose of the intermediate sections. A plurality of threaded nipples 24are provided, each threaded into the apertures of the walls of adjacentsections, and these nipples serve to establish communication betweeneach section and the next adjacent one, and also serve to support eachsection from the one below. Each of the intermediate sections isprovided with a passage 25 therethrough by means of which the spacesintermediate the several sections or chambers communicate with eachother. Each of these passages is preferably formed at the side of itssection and is open at its outer side, the circumferential wall 22 ofthe section having a rentrant portion 22a to leave a recess constitutingthe passage. In assembling the intermediate sections, they are sodisposed that the passage of one section is located at the opposite sidefrom the passage of the adjacent sections, whereby the space between thesections or chambers and the passages forms a zigzag conduit.

The uppermost section is provided with upper and lower walls 26 and 23,and a circumferential wall 27 in alinement with the circumferentialwalls 22 and l5. The walls of the upper section or chamber are providedwith a suitable steam or water inlet 28 and a suitable steam or wateroutlet 29, whereby the heating medium may be continuously circulated toand from the boiler. The entire series of sections is inclosed in acasing 30, closely 'fitting the outer circumferential walls and formingwith the spaces between the sections and the passages 25, a continuouszigzag conduit for the products of combustion rising from the firechamber through the passage 18. Just below the upper chamber, the casingis provided with a suitable outlet conduit 31 leading to the chimney andserving to permit of an escape of said products of combustion.

In order to clean the spaces intermediate the sections withoutdisassembling the entire device, the casing is provided with a pluralityof apertures 32 adjacent the several sections and of a heightslightly-greater than said sections, each aperture being preferablydisposed adjacent a .passage 25 and normally closed by a suitable door33. Each aperture and its door or closure is so disposed that a cleanermay be inserted through the aperture both above and below the particularchamber adjacent the same, whereby all of the soot, or other accumulatedmaterial may be removed. For cleaning and draining the space within thechambers or sections, the lowermost section is preferably provided witha suitable outlet 34,v through which the water may be drawn olf.

The circumferential casing 30 is unattached to the sections, and may bereadily removed without disturbing any of the sections or theconnections between the same. Any desired number of sections may beemployed, and the structure thus built up to any desired height. Thelowermost section seaaee' or chamber incloses the lire box, so as toforni a water jacket around its outer sides and prevent the direct lossof heat, and all chambers, save the tcp one, are subjected to the heatof the products of combustion upon both their upper and their lowersides.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

l. In combination, a series of communicating chambers arranged one abovethe other and adapted for the reception of the water to be heated, saidchambers being so disposed as to leave a space between each pair ofadjacent chambers, passages connecting said spaces to form a zigzagconduit, the lowermost chamber having an upper wall, a substantiallydome-shaped lower wall, and a vertical circumferential wall, and thespace beneath said dome constituting a lire chamber, passages throughsaid lowermost ch'amber to said iire chamber, and a casing inclosingsaid chambers.

2. In combination, a series of communicating chambers arranged one abovethe other and adapted for the reception of the water to be heated, saidchambers each having a recess in one side thereof constituting apassage, whereby the spaces between said chambers communicate with eachother, the recesses in adjacent chambers being formed in correspondinglyopposite sides, a metal casing inclosing said chambers and havingopenings adjacent each chamber, whereby the spaces intermediate thechambers may be cleaned, and means for closing said openings.

3. In combination, a series of communicating chambers arranged one abovethe other and adapted for the reception of the water to be heated, saidchambers each having a recess in one side thereof constituting apassage, whereby the spaces between said chambers communicate with eachother, the recesses in adjacent chambers being formed in correspondinglyopposite sides, a casinginclosing said chambers and having an openingadjacent each chamber, whereby the spaces intermediate the chambers maybe cleaned, and means for closing said openings, said openings beingdisposed adjacent the recesses in said chambers and said casing beingunattached to said chambers.

In testimony whereof I have signed my name to this specification in thepresence two subscribing Witnesses.

WILLIAM SERVISS HAWLEY. I

